42774593 has 2 divisors, whose sum is σ = 42774594. Its totient is φ = 42774592.

The previous prime is 42774581. The next prime is 42774647. The reversal of 42774593 is 39547724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42406144 + 368449 = 6512^2 + 607^2 .

It is a cyclic number.

It is not a de Polignac number, because 42774593 - 2⁴ = 42774577 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42774593.

It is not a weakly prime, because it can be changed into another prime (42773593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21387296 + 21387297.

It is an arithmetic number, because the mean of its divisors is an integer number (21387297).

Almost surely, 2^42774593 is an apocalyptic number.

It is an amenable number.

42774593 is a deficient number, since it is larger than the sum of its proper divisors (1).

42774593 is an equidigital number, since it uses as much as digits as its factorization.

42774593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 41.

The square root of 42774593 is about 6540.2288186271. The cubic root of 42774593 is about 349.7265701180.

The spelling of 42774593 in words is "forty-two million, seven hundred seventy-four thousand, five hundred ninety-three".